<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../jquery.min.js"></script>
    <style>
        div {
            width: 200px;
            height: 200px;
            background-color: pink;
        }
    </style>
</head>

<body>
    <script>
      //1.$是jquery的别称(另外的名字)
    //   $(function(){
    //       alert(11)
    //   });
    jQuery(function(){
        // alert(11);
        // $('div').hide();
        // jQuery('div').hide();
    });
    //2.$同时也是juqery的顶级对象
    </script>
    <div></div>

</body>

</html>